Tag 'ref = 020'

• 20: ref
• 12: source
• 11: species:de
• 11: genus:de
• 11: source:date
• 11: start_date
• 11: natural
• 11: genus
• 11: species
• 11: circumference
• 10: operator
• 9: height
• 5: level
• 5: diameter_crown
• 5: indoor
• 4: leaf_type
• 3: check_date:ref
• 1: note
• 1: door
• 1: amenity
• 1: operator:wikidata
• 1: operator:short
• 1: leaf_cycle
• 1: substation
• 1: speisebezirk
• 1: power
• 1: railway
• 1: waterway:sign
• 1: door:height
• 1: waterway:maxspeed
• 1: obstacle:parking